So... why not vacuum ?
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The heads float just above the platter on a cushion of entrained gas. They basically fly like a wing in ground effect.
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This is news to me. Last I knew, hdds were always at atmospheric pressure. (Hence the DO NOT COVER hole on the lid, which goes through a filter to the inside of the disk).
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Not present on helium drives. They are low pressure, contained vessels whereas normal drives need that hole to maintain pressure normalisation even in high heat conditions.
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How about the issue of helium being a finite resource better used in medical equipment?
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Almost certainly wrong: Global He consumption is 30,000 metric tons/year, He weighs 0.04 g/L at STP, some 400 million drives sold per year. If each drive required 1 L of He and all drives were helium-filled, that'd still only represent an extra 1/200th of the market.
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This is some outstanding Christmas content
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from "A Study on Positioning Error Caused by Flow Induced Vibration Using Helium-Filled Hard Disk Drives", Aruga et al
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Interesting
, could you share any study journal about this content please. -
Sure! from "A Study on Positioning Error Caused by Flow Induced Vibration Using Helium-Filled Hard Disk Drives", Aruga et al
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